code: def h5file_1(tmp_path):
      p = tmp_path / "file.h5"
      with h5py.File(p, "w") as w:
          w["a"] = np.random.randn(100, 80)
          w["b"] = np.random.randn(150, 80)
      return str(p)
  
imports: import h5py
  import kaldiio
  import numpy
  import pytest
  from espnet2.fileio.npy_scp import NpyScpWriter
  from espnet2.fileio.sound_scp import SoundScpWriter
  from espnet2.train.dataset import ESPnetDataset
label_desc: Use image node_id 8 for calling a global function with example usage: h5file_1(tmp_path) and returns: str